"These 13 hookah bars are knowingly flouting the law by serving tobacco-based shisha," said Health Commissioner Dr. Mary Bassett. "We will not tolerate this willful disregard of New York City’s smoke-free air laws and have already taken steps to revoke the permits of these establishments."

The agency said they discreetly took samples from the bars and sent them in for testing only to find all contained tobacco.

Tobacco smoking was banned in workplaces, restaurants and bars in the city in 2002.